129435412 has 24 divisors (see below), whose sum is σ = 230966120. Its totient is φ = 63452160.

The previous prime is 129435409. The next prime is 129435413. The reversal of 129435412 is 214534921.

It can be written as a sum of positive squares in 4 ways, for example, as 53640976 + 75794436 = 7324^2 + 8706^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129435413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99148 + ... + 100444.

Almost surely, 2^129435412 is an apocalyptic number.

It is an amenable number.

129435412 is a deficient number, since it is larger than the sum of its proper divisors (101530708).

129435412 is a wasteful number, since it uses less digits than its factorization.

129435412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771 (or 1769 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 129435412 is about 11376.9684890132. The cubic root of 129435412 is about 505.8452817393.

The spelling of 129435412 in words is "one hundred twenty-nine million, four hundred thirty-five thousand, four hundred twelve".